Mysterious
Puzzling
Synonyms Puzzling, peculiar, funny, odd, bizarre, inexplicable, perplexing, confusing, dark, incomprehensible, unfathomable, sibylline, insoluble, arcane, secret, occult, hidden, supernatural, strange, curious, queer, weird, mystifying, baffling, bewildering, uncanny, impenetrable, unexplainable, Delphic, unaccountable, obscure, recondite, esoteric, cryptic, concealed, and mystical.
Enigmatic
Synonyms Enigmatic, secretive, cloak-and-dagger, non-committal, evasive, surreptitious, black, inscrutable, sphinxlike, reticent, discreet, furtive, and covert.
Example Sentences
The forest held a mysterious aura.
She received a mysterious letter today.
He told a mysterious old story.
There was a mysterious noise outside.